It’s Romance Saturday at Shiny Book Review! So what could be better than another romantic science fiction/mystery offering from Stephanie Osborn?

Tonight’s subject is book 5 in her long-running, popular Displaced Detective series featuring Sherlock Holmes and his wife, Skye Chadwick-Holmes, A CASE OF SPONTANEOUS COMBUSTION. (Books one and two of the series were reviewed here; book three was reviewed here; and book four was reviewed here.) This time, Sherlock Holmes is summoned to merry old England without his wife, Skye, to consult on a perplexing case: the village of Stonegrange has died all at once, apparently of spontaneous combustion, and no one knows how or why. And for reasons of national security, Sherlock isn’t even allowed to wake her up to tell her what’s going on.

This is a problem, as Sherlock and Skye haven’t been married all that long (maybe a year, tops), and have just had a huge fight (as newlyweds the world over tend to do). The fight was over something minor, and if Sherlock had been able to tell Skye that he’d been summoned to England, it’s possible the two would’ve made up right then and there — but he wasn’t, and they’re both about to be in a world of hurt.

While Sherlock tries desperately to figure out what’s happened that’s caused Stonegrange to spontaneously combust, Skye is left at home in Colorado. Both are miserable, both try to write each other letters, but as their letters are considered classified on both ends, there are intermediaries between them and their letters to one another.

And their letters are not getting through, which adds immensely to their overall “frustration factor.”

Making matters even more dicey, the mystery of Stonegrange has a strong scientific component, so Sherlock needs Skye. And she’s not there, so solving the mystery is made that much slower and more complex, too.

Mind, Sherlock doesn’t know why Skye wasn’t sent for along with him. Neither do the people who guard Sherlock and Skye on a regular basis. And as the National Security Act has been invoked, it’s keeping them from talking with their counterparts as they normally would.

So that, too, is a mystery that both need to solve . . . but as they’re both extremely upset (Skye has fallen into a severe depression), it takes a bit more time than usual to get to the bottom of this problem.

Regarding Stonegrange, Sherlock goes undercover to find out who did this and why. He uncovers a few leads, but again realizes he needs Skye’s scientific expertise.

After quite some time, romantic and domestic matters are resolved and Skye’s back where she belonged. (So for romance readers, there is a “happily ever after” ending.) And a good thing, too, as Skye’s knowledge of physics is absolutely essential to the solving of this particular mystery.

As always with the work of Stephanie Osborn, her command of language is strong, while her knowledge of physics, England, and Sherlock Holmes trivia is excellent. Her pacing is good, the romance is outstanding, and the hard SF component (the physics involved) is explained well enough that I had no trouble figuring out what was going on.

The one quibble I had here is that the ending was a bit too gentle for my tastes. After all the sturm und drang Sherlock and Skye went through to get back into contact with one another, and then back to each other, I would’ve liked to see some retribution handed out to the person who kept them apart.

But everything else worked quite well.

Bottom line? It’s not everyone who can make cutting-edge physics comprehensible to the intelligent layman and write a kick-butt romance along with an absorbing mystery all at the same time, but Stephanie Osborn did just that in A CASE OF SPONTANEOUS COMBUSTION.